VLT®2800 Series
■General warning
The voltage of the frequency converter is
dangerous whenever the converter is con-
nected to mains. Incorrect fitting of the
motor or frequency converter may cause damage to
the equipment, serious injury or death. Conse-
quently, it is essential to comply with the instructions
in this manual as well as local and national rules and
safety regulations
■These rules concern your safety
1. The frequency converter must be disconnected
from the mains if repair work is to be carried out.
Check that the mains supply has been discon-
nected and that the prescribed time has passed
before removing motor and mains plugs.
2. The [STOP/RESET] key on the control panel of
the frequency converter does not disconnect the
equipment from mains and is thus not to be used
as a safety switch.
3. The unit must be properly connected to the earth,
the user must be protected against the supply
voltage and the motor must be protected against
overloading pursuant to prevailing national and lo-
cal regulations.
4. The earth leakage currents are higher than 3.5
mA.
5. Protection against motor overload is not included
in the factory setting. If this function is required,
set parameter 128 Motor thermal protection to
data value ETR trip or data value ETR warning.
For the North American market: The ETR func-
tions provide overload protection of the motor,
class 20, in accordance with NEC.
6. Do not remove the plugs for the motor - and
mains supply while the frequency converter is
connected to mains. Check that the mains supply
has been disconnected and that the prescribed
time has passed before removing motor and
mains plugs.
7. Note that the frequency converter has more volt-
age inputs than L1, L2 and L3 when the DC bus
terminals are used. Check that all voltage inputs
are disconnected and that the prescribed time
has passed before repair work is commenced.
■Warning against unintended start
1. The motor can be brought to a stop by means of
digital commands, bus commands, references or
a local stop, while the frequency converter is con-
nected to mains. If personal safety considerations
make it necessary to ensure that no unintended
start occurs, these stop functions are not suffi-
cient.
2. While parameters are being changed, the motor
may start. Consequently, the stop key [STOP/RE-
SET] must always be activated, following which
data can be modified.
3. A motor that has been stopped may start if faults
occur in the electronics of the frequency con-
verter, or if a temporary overload or a fault in the
supply mains or the motor connection ceases.
195NA139.10
Warning:
It can be extremely dangerous to touch the electrical parts
even when the mains supply has been disconnected.
Also ensure that other voltage inputs are disconnected
from load sharing, for example (sharing of DC intermediate
circuit). For VLT 2800: wait at least 4 minutes.
MG.28.A5.02 - VLT is a registered Danfoss trade mark
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